Centre: AB magnitude distribution of all sources (measured in the F200W filter), against the spectroscopic redshift measured from NIRISS. We distinguish between ‘secure’ redshifts, shown as solid blue circles, and ‘tentative’ redshifts, plotted as empty black circles. Upper: Corresponding stacked redshift histogram, showing the number of sources in each bin of width 0.05. Here, tentative redshifts are displayed as an unfilled histogram. Right: As before, showing the distribution of source magnitudes in bins of width 0.5 dex.